Automatic sheet changing for reprographic machine

A cartridge for containing and serially feeding fresh sheets and for recovering used sheets respectively to and from a reporgraphic machine having a fresh sheet entry member and a used sheet exit, the cartridge comprising:

• a container having means defining a first and a second chamber and means defining a corresponding opening for each chamber,
• means connected to said container for removably positionifng the cartridge in the reprographic machine with said first opening adjacent to said fresh sheet entry and said second opening adjacent to said used sheet exit,
• a feed reel in said first chamber,
• a take-up reel in said second chamber,
• a flexible support wound on said feed reel and having an end portion wound on said take-up reel,
• a plurality of fresh sheets disposed in regularly spaced positions on said support, and interwound with said support on said feed reel,
• first guiding means for guiding said support from said feed reel to said take-up reel along a predetermined path going out from said first chamber through said first opening and entering into said second chamber through said second opening,
• means connected to said reels and operable when the cartridge is positioned in the reprographic machine for advancing said flexible support and a fresh sheet positioned thereon from said feed reel along said path,
• means adjacent to said first opening for separating a fresh sheet advancing along said path from said flexible support to deflect it towards the fresh sheet entry, and
• second guiding means in said second chamber for guiding, during the advancing of said flexible support, a used sheet entering into said second chamber through said second opening to wind the used sheet with said flexible support on said take-up reel.